LogFAQs > #942585596

That's going to be very situational I think. I would think any with a good effect are worth keeping and anything that fits your subgrid weapon type is also worth keeping as it will be a while before you can field enough memoria that replaces them, especially when you factor in element types

And I would be concerned about feeding them for awakenings in case they make the universal item for improving SSRs Memoria more readily available. I don't think they are going to dole them out like candy but I wouldn't be surprised if they added them to event rewards or exchanges where you can snag one every now and again